海洋放流 시스템의 最適設計에 關한 硏究

Abstract

A demand of marine outfall system have been much increased for the effective disposal of the wastewater due to population and industrial development at the coastal areas. The outfall system discharges primary or secondary treated effluent into coastline or at the deep water, or between these two.

Thus there have been growing interests about plume behaviour around the outfall system. Plume or Jet discharged from single-port or multi-port diffuser impacts seriously on coastal environment. Near field mixing characteristics of discharged water field using CORMIX model has been studied for effective outfall design and indicated the result that various conditions on ambient current, depth, flow rate, effluent concentration, diffuser specification, port specification etc. influence the near field dilution and mixing. This results might contribute to deal with serious water quality problems caused by the ocean discharge.

It has been founded the early dilution is important, especially for the numerical simulation by a depth averaged hydrodynamic model of diffusion mechanism at the existing flow field and applied it to the Pusan Jungang Effluent Outfall System, which is planned to be in the Gamchun harbour and will be completed in 2011. The model output showed the trajectoral variation of near-filed dilution and mixing behaviour for four temporary stations located coastline and deep water under 4 cases including flow rate the effect of different and port diameter. The variation of dilution, wastefield thickness and rise height have been simulated and found the best dilution condition under the different displacement of outfall system. On the basis of these outputs we proposed a proto type of the optimum outfall system type and the location of the diffuser.